I recently purchased the RX 100M2, have had limited use of it so far, but time I have had with the EVF has been good. To soon to talk about quality, my PC is in the shop so can't really work the photo's. By all accounds the IQ should be better on the RX100, vs your LX7, but IQ is not everything! If so we would ALL be walking around with full frame cameras or Medium format cameras...

My advise keep the LX7 you been happy with it and you said it best.

The LX7 is more fun! For as amatures thats what should be all about!

Put the RX 100 on line, think you can make a few bucks, sounds like you got one heck of a price!